Lepton Nuclear Physics Group



Oto Cosmo Observatory

Subjects

  • Double Beta Decay Experiment
  • Dark Matter Searh
  • 3He+3He --> 2p + 4He Reaction Experimet
    INFORMATION

    Ejiri Home Page

    Itahasi Home Page

    Kudomi Home Page

    OTO98

    「極低放射能バックグラウンド 環境下における科学とその展望」ワークショップ


    OTO Cosmo Observatory

    The OTO Cosmo Observatory is the center of OTO Tentsuji tunnel which is located 100km south from RCNP. The maximum depth is about 470m. This is an ultra low-background laboratory with 4×10-7/cm2・sec for cosmic ray, 4×10-5/cm2・sec for neutron flux, and about 10 Bq/m3 for radon concentration in the air.

    ELEGANT V

    ELEctron GAmma-ray Neutrino Telescope (ELEGANT V), whole detectors are surrounded by Lead and Copper (OFHC) shields, DC: Drift Chambers. PL:plastic scintillators, NaI: NaI scintillators, 100Mo source of double beta decay.